Product range

high pressure by-pass stations, medlLrm pressure by pass stations

start-|,rp / by-pass stations, steam converson slat ons

pre heater control systems pressure contro valves, fow contro valves

feedwater conlro vaves, discharge and b ow down control valv-os

minimum fow swtch ng / contro lvalves, h igh-pressure sh! t ot f vaves

ba lype conirolvaves, blow'down valves and programmed control

high pressure level swilch, h gh-pressure evel meas!rement converter

iurb ne by pass syslern electrlca actuators, pneumatc actuators

e ectro- hyd rau lic actuaiing systems

oxygen contro l vaves, gas contro lvalves, gas qu ck-c losing vaves

healrng vaves, therrnostatic valves, manua control valves

corr]mission ng, service, nspecl on

Areas of application

. power staton techno ogy, envrronmentai technology, metal lurgical technology

. paper and pulp industry chemica and pelrochemica ndustries

. oxygen p anrs

Control valve HIGH VALVE 3OO

Th s valve as a basis ser es has been desig ned for a most al control iasks of power

stalion technology and p ant engineerng. Bes des the c assical media ol power station

technology like condensate, steam, nalura gas and oi, ihis vave s iherelor€ aiso used

lo contro styrene, propylene, hydrogen, butadene, n butane, etc.

Forthe ppeine conslruclion we can supply ths series wiih a fire-safe cedificat on to

836755. DvGw-lested valves and seaing systems with belows and safety gland have

also been n use lor years,

Specification:

. The cast body has a very ow zeta value and arge re ief spaces above and beow the

seal.. The base materal of the body s GS C25N. Higher alloyed malerias and materals as

per ASTN/ standard arc avalable.. Connect ng llange as per D N/ANSI or BW connections of suitab e mater al for the

p pe ine are standard.. Ind vidual y configured s ngle or muli stage tr ms wh ch can also be pressure-

baanced are responsblefor the controlquaity and large conlro ratos.. Electr c, pneumalic and hydraul c drives manufaciured by us or äny commercial y

avalable drive lrom oiher manufaciurers can be ftted. Al unts are suppied tested

Nominal diameters

DN ]5 - DN 600

Nom jnal pressure ratings

PN 40 PN 250

Operating temperatures

approx 200'C to +500'C

I, l

Control valve HIGH VALVE 450

Th s HANNEMANN contro va ve s used when the criteron s prec se and ow no se

contro n the h ghest pressure and temperaiure ranges. This valve ls above al lsed in

pow-.r station technology on lhe h gh pressure feedwater side and ln the ive slearn

area n lhe form of pressure conlro vave, bow down and discharge vave, stad-up/by-

pass stat on and tlrbne by pass. ndivdua y confgured trms enslre a pertect system

so uton ior each process.

Specification:

. The body s manufactured n ang e or z-shape desig n using forged matera.

. The gobuar Shape ofthe bocly with uniform wa thckness prevents unacceptabe

h gh fringe fbre stress during temperature ilucluai ons. We d end connect ons are se ected from nraleria s which a low a prob emjree

weld ng to the ppe materia.

Hermeucaly sealng singe-seal pugs wth orwthout pressure reiei are lsed These

tr rns cons sling of a seat ng bush nsert and a control p Ug can be qu ckly rernoved

and overhaued n the workshop. There is no on ste work n the vave body

Low nose pressure reducton by |rp to seven controiled pressure feduc ng stages.

Fixed stages are completey avo ded wherever poss b e,

Electr c, pneLrmat c and hydrau ic dr ves wh ch are n part manufactured by us or any

commercaly avaiabe drive from other rnanufaciurers can be ftted A units are sup-

pled tested and adlusted

Nominal diameters, in/out

DN 40 DN 450 / up 1o DN 1400

Design pressures/temperatures

up to approx. 350 bar and up to 620'C

Feedwater control valve HIGH VALVE 55O

Ths classical feedwater CV from HANNEI/ANN for hgh'pressure bo ers has been

workng reiabLy n many panis around the world for decades and has been recent y

Downstream from predorninanty speed controled pumps, this valve controls the feed

water llow to the boier with mnrnum pressure oss

Specification:

The body wthsiands h gh p peine forces wlhout unpernritted deformaton by way of

The body s avaiabe n highly wearresistant CrN Mn stee ior eroson'risk areas.

The doub e p sion trim can be quick y removed and overha! ed An eco

nom ca overhalr wthout on s te work is lheTefore ensured

The requ red control forces aTe very ow n compar son to other va ve types of th s

nexpens ve and ow power drves ike pneumatic rnembrane types fu y suffice.

Nominal diameters

DN 65 DN 350

Nominal pressurc ratings

P N 1 0 0 - P N 6 4 0

Operating temperatures

approx. 10"C 350'C

Oxygen control valves

Oxygen contro vaves are used n the ron and stee industry,

Based on the bodes of lfre 200 and 300 series, these valves are designed and manu-

factured lor lhe spec al requ rements of oxygen plants. Th€y are uslräly equpped wth

pneumatic actuators lor exposon protection reasons,

Specitication

. Cast body of Cu-Alaloy wlh flange conneclon

Snge seat and doube seat designs are lsed. The trim des gn s adapled to comply w th the spec f c requirement. Varianls with

pressure equalised throtte bal and/or hermetcally seaiing contro bals with soft

rnater alcoat are supp ied. These valves are shpped free ofgrease and oi n accordance wrth the requrernents

Nominal diameters

DN 15 DN 5OO

Nominal pressure ratings

P N T 6 1 6 0

Operating lemperatures

20'c - 80"c

Gas control valves

Gas contro vaves are used for power controlof gas turbines (e.9. n G&S planis).

They are often equipped w th addit ona quick c ose funct ons.

A standard gas quck cose vave s used as a secondary shut olf

Specification

. The flow nomna ine ofthe conirolvalves compies wiih EC 534 with reduced tol€

rance range Ths alows an exact setr ng of lhe gntion poinl and the direct power

conlro ofthe turbine,. The controlbalis pressure releved. Smd ow cost drives can therefore be used.

The cenlral lubricai ng o syst€rn oftheturbne can also be used for drive swtchng.. The vaves are hermetcaly seaed to the outsde and in the valve seat. Leakage

. The quick c ose funcilon s trggered by the ntegrated safety devce n the event of

mafunclion, Closing lime < 0,3 s

Nominal diameters

DN 25 DN 5OO

Nominal pressure ralings

P N i 6 1 6 0

Operating temperatures

20'c 280"c

II

product sampry&ffi

TUröine by-pass system

A tlrlclne by-pass system as per TRD421 is achieved by way of combining the HIGH

VALVE 450 ser es pressure reduction valve with

. a downstream operating steam desuperneater

. a safety quick acling lunct on

. a hydraulic or pneumatlc actuator

. and a component-certilied steam lesting laciliiy ("DampfprÜfstock') and the assoc a_

ted safety devices.

Specification

. operating steäm Jor the downstream desuperheater is taken from the pressure

reduction valve after ihe seat.

A separate open/close valve wlih the necessary function logic can be dispensed

wth completely.

The operating steam desuperheatef cools the steam to condensator lemperature

without endangering the downstream p peline by excess waler'

Ratios n excess of 35yo water to steam conlent can be contro led w thout prob em.

The mulustage pressure reduction valve and the operating steam desupemea€r

work exiremely quietly and fulfil al curr€nt lmll values wthout costly secondary

The complete system, ncLuding the hydraul cs/pneumatics, is manulactured by us

LJnils arc supplied tesied and, f required, can be installed and commissioned by our

specialst stafi.

Nominal diameters, in/out

DN 40 DN 450 / up to DN 1400

Design pressur€s / temperatures

up to approx. 350 bff and up to 620'c

PRUSS &ffiHANNEMANN

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PRUSS &IHANNEMANNAG

nrJ_ssWaldemar PrussArmaturenfabrik GmbH

Schuleilburger Landstraße 261D-30419 Hannovor

Phon6 +49 (0) 511 2 73 86-0Fax +4S {oi 511 2 79 86-86info@pruss.dehltp:/www.pruss.de

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SLssHAltaEltA ra & PnUSS GmbH

K6llwerks- und hdusld.amaluron

Hännemann & Pruss GmbH

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enone +ts 1o1rl - f,f,J9'l -QFax +ae @) 21'Z-38357 - 40inf o@hann€mann-pruss,dehttp:/wwwhann€mann-pruss,do

Pruss & Hannemann AG

Schulenburgor Landstraße 26 1D-30419 Hannovef

Phome +49 (0) 511 2'79 86-0Fax +49 (0) 5'11 2-79 86-86inf o@pruss-hann6mann.d€htip:/wwwpruss-hannemann,de